CN215771027U

CN215771027U - Miniature circuit breaker structure

Info

Publication number: CN215771027U
Application number: CN202122019585.XU
Authority: CN
Inventors: 李立鹏
Original assignee: Wenzhou Kaixin Electrical Co ltd
Current assignee: Wenzhou Kaixin Electrical Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-02-08
Anticipated expiration: 2031-08-25

Abstract

The utility model discloses a miniature circuit breaker structure, which comprises a shell and a handle rotationally arranged at the top of the shell, wherein the top of the shell is provided with a movable groove for the handle to perform opening and closing movements, the handle is provided with an operating part penetrating and extending out of the movable groove, the two ends of the movable groove are respectively a closing end and an opening end, the top of the shell is provided with a shield structure higher than the operating part around the closing end, the technical mode is adopted for arrangement, when the handle moves to the closing end, the operating part is driven to be accommodated in the accommodating groove formed by the protective cover structure, the operating part in place for closing is semi-surrounded by the protective cover structure, so that the breaker is prevented from breaking and breaking due to the falling of foreign matters in the vertical direction or the accidental touch of external force on the handle at the closing position, the design not only plays a role in shielding and protecting the handle at the closing position, meanwhile, the circuit breaker also has the function of preventing misoperation, has good installation and use stability, and ensures the normal and safe use of the circuit breaker.

Description

Miniature circuit breaker structure

Technical Field

The utility model relates to the technical field of low-voltage electric appliances, in particular to a miniature circuit breaker structure.

Background

The low-voltage circuit breaker can be used for connecting and disconnecting a load circuit and also can be used for controlling a motor which is started infrequently, and is an important protective electrical appliance in a low-voltage distribution network. A circuit breaker generally comprises a contact system, an arc extinguishing system, an operating structure, a release, a housing, a handle, and the like.

The circuit breakers on the market are various, wherein, the hydraulic electromagnetic circuit breaker is a more advanced circuit breaker of a new generation, and the hydraulic electromagnetic tripping device is adopted, so that overload tripping and short circuit tripping can be integrated, the circuit breaker is also called a full electromagnetic circuit breaker, and has the advantages of no influence of environmental temperature, always keeping 100% rated capacity, being capable of being closed immediately after tripping, large selectable range of circuit breaker tripping time requirement, various characteristic curves for selection, customized according to the characteristic curve degree required by a user, stable and reliable work, long service life and the like.

The circuit breaker is usually used for the electricity distribution room, be used for putting through and breaking load circuit in the switch board, in the in-service use, the circuit breaker is the card rail of vertical form installation box room or cabinet (the incoming wire terminal of circuit breaker up, its leading-out terminal is down), the circuit breaker is under the combined floodgate state, the circuit breaker handle is according to the requirement to dial up and be in the combined floodgate position, consequently, there is foreign object to drop or all can push the handle when having external force mistake touching handle on the vertical direction of circuit breaker, handle under touching the combined floodgate state through the mistake leads to its malfunction, thereby cause the mistake separating brake operation of circuit breaker, the normal safe handling of circuit breaker has been influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a micro circuit breaker structure which can prevent the circuit breaker from accidental opening and power failure caused by foreign matters falling in the vertical direction or the handle in a closing state touched by external force by mistake, has good use stability and ensures the normal and safe use of products.

In order to achieve the purpose, the utility model provides a miniature circuit breaker structure, which comprises a shell and a handle rotatably arranged at the top of the shell, wherein a movable groove for the handle to perform opening and closing movements is arranged at the top of the shell, the handle is provided with an operating part penetrating through the movable groove, two ends of the movable groove are respectively a closing end and a separating end, the operating part is driven to abut against the separating end or the separating end when the handle is in a closing position, the top of the shell surrounds the closing end and is provided with a shield structure higher than the operating part, and the operating part is semi-surrounded by the shield structure when moving to the closing end along with the handle and is accommodated in an accommodating groove formed by the shield structure.

As a preferred scheme, the shield structure comprises two side baffles arranged at two sides of the accommodating groove and a shielding boss connected between the two side baffles, the shielding boss is connected with the two side baffles to form the accommodating groove, and the shielding boss is higher than the operating part accommodated in the accommodating groove.

Preferably, the accommodating groove has an opening connected to a closing end of the movable groove, and the opening extends to the tops of the two side baffles.

Preferably, the shield structure is formed at the upper left end of the top of the shell close to the wire-inlet side terminal, and the side profile of the shield structure is in a trapezoidal shape.

As a preferable scheme, the movable groove is of an arc-shaped groove structure, a locking hole for penetrating a locking piece is formed in the middle of the movable groove, and the locking piece is penetrated in the locking hole to limit the handle to reciprocate between the closing end and the opening end.

As a preferred scheme, the arc striking device further comprises a moving contact and a fixed contact which are arranged in the shell, and two arc extinguishing chambers which are arranged below the moving contact and the fixed contact relatively, wherein an arc striking channel structure in a Y-shaped structure extends between the moving contact and the fixed contact as well as between the two arc extinguishing chambers.

As a preferred scheme, one of the arc extinguishing chambers is arranged below the fixed contact, the other arc extinguishing chamber is arranged below the movable contact, and the volume of the arc extinguishing chamber arranged below the fixed contact is smaller than that of the arc extinguishing chamber arranged below the movable contact.

As a preferable scheme, the arc striking channel structure comprises a first channel which is connected with one of the arc extinguishing chambers in an extending way, a second channel which is connected with the other arc extinguishing chamber in an extending way, and a third channel which is intersected with the first channel and the second channel and extends to a contact of the movable contact and the fixed contact.

As a preferred scheme, an operating structure connected with the handle and a hydraulic electromagnetic tripping mechanism connected with the operating structure are arranged in the shell, the operating structure drives the moving contact to contact with or separate from the fixed contact when the handle performs switching on or switching off, and the hydraulic electromagnetic tripping mechanism drives the operating structure to perform switching off tripping action when triggered, so that the moving contact is separated from the fixed contact under the driving of the operating structure.

As a preferred scheme, the operating structure includes a contact support rotatably disposed on the housing, and a locking member and a releasing member pivotally disposed on the contact support, the moving contact is disposed on the contact support, the locking member and the releasing member have a locking state in which they are connected to each other by fastening and a releasing state in which they are separated by releasing, the hydraulic electromagnetic tripping mechanism has a driving assembly that drives the releasing member and the locking member to move from the locking state to the releasing state when triggered, the driving assembly is composed of a driving plate and a rotating arm, and the releasing member is correspondingly provided with a releasing boss that is engaged with one end of the rotating arm.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

1. in the miniature circuit breaker structure provided by the utility model, the sheath structure is arranged at the top of the shell corresponding to the closing end of the movable groove, the sheath structure is higher than the operating part of the handle, and is arranged on the clamping rail along the vertical direction according to the breaker, namely, the shield structure is positioned just above the operating part at the closing end position, so the design has the advantages that, when the handle moves to the closing end, the operating part is driven to be accommodated in the accommodating groove formed by the protective cover structure, the operating part in place for closing is semi-surrounded by the protective cover structure, so that the breaker is prevented from breaking and breaking due to the falling of foreign matters in the vertical direction or the accidental touch of external force on the handle at the closing position, the design not only plays a role in shielding and protecting the handle at the closing position, meanwhile, the circuit breaker also has the function of preventing misoperation, has good installation and use stability, and ensures the normal and safe use of the circuit breaker.

2. In the structure of the miniature circuit breaker provided by the utility model, the shield structure consists of two side baffles and a shielding boss, when the handle is in the switch-on position, the handle can drive the operating part to be accommodated in the accommodating groove formed by connecting the two side baffles and the shielding lug boss, and according to the condition that the shielding lug boss is higher than the operating part, therefore, in the vertical installation direction, the shielding boss plays a role in shielding and protecting the operation part, prevents foreign matters from falling in the vertical direction of the circuit breaker and touching the handle to cause misoperation, and plays a role in shielding positions at two sides of the operation part through the two side baffles, thereby preventing the misoperation of the handle caused by the touch of the external force on the side surface on the operation part, realizing the semi-enclosure of the handle at the switch-on position through the arrangement of the protective cover structure, and shelter from the operating portion of handle in the vertical direction, the guard effect is good, guarantees the circuit breaker safe handling.

3. The miniature circuit breaker structure provided by the utility model has the advantages that the two arc extinguishing chambers are arranged in the shell, and the arc striking channel structure with the Y-shaped structure is arranged between the two arc extinguishing chambers and the movable contact and the stationary contact, so that the arc striking channel structure with the Y-shaped structure is favorable for quickly striking an arc between the two arc extinguishing chambers and enlarging the arc striking range, when the movable contact and the stationary contact are broken to generate the arc, the arc is respectively introduced into the two arc extinguishing chambers through the arc striking channel structure to quickly extinguish the arc, the arc extinguishing range is enlarged, the arc extinguishing capability is obviously improved, the breaking capability of the circuit breaker can be improved, the advantage that the two arc extinguishing chambers simultaneously perform arc extinguishing work is utilized, the arc extinguishing efficiency is greatly improved, the circuit breaker is favorable for developing towards miniaturization and high breaking tendency, and the service performance of a circuit breaker product is improved.

Drawings

In order to more clearly illustrate the detailed description of the utility model or the technical solutions in the prior art, the drawings that are needed in the detailed description of the utility model or the prior art will be briefly described below.

Fig. 1 is a schematic perspective view of a miniature circuit breaker according to the present invention;

fig. 2 is a front view of the miniature circuit breaker configuration of the present invention;

FIG. 3 is a side view of the miniature circuit breaker configuration of the present invention;

fig. 4 is a schematic diagram of the internal structure of the miniature circuit breaker structure of the present invention;

FIG. 5 is a partial schematic diagram of an operational configuration of the present invention;

description of reference numerals: 1. a housing; 11. a moving contact; 12. static contact; 2. a handle; 21. an operation section; 3. a movable groove; 30. a locking hole; 31. a switching-on end; 32. a brake separating end; 4. a shield structure; 41. an accommodating groove; 42. shielding the boss; 43. a side dam; 5. an arc extinguishing chamber; 6. an arc initiation channel structure; 7. an operating structure; 71. a locking member; 72. releasing the fastener; 73. a contact support; 74. a tripping boss; 8. a hydraulic electromagnetic trip mechanism; 81. a rotating arm; 82. a drive plate.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The embodiment provides a miniature circuit breaker structure as shown in fig. 1-5, which includes a housing 1 and a handle 2 rotatably disposed on the top of the housing 1, the top of the housing 1 is provided with a movable groove 3 for the handle 2 to perform opening and closing movements, the handle 2 is provided with an operating portion 21 extending through the movable groove 3, two ends of the movable groove 3 are respectively a closing end 31 and an opening end 32, when the handle 2 is in a closing or opening position, the operating portion 21 is driven to abut against the opening end 32 or the opening end 32, the top of the housing 1 is provided with a shield structure 4 higher than the operating portion 21 around the opening end 31, and when the operating portion 21 moves to the opening end 31 along with the handle 2, the operating portion is semi-surrounded by the shield structure 4 and is accommodated in an accommodating groove 41 formed by the shield structure 4.

The above embodiment is the core technical solution of this example, by arranging a sheath structure on the top of the housing 1 corresponding to the position of the closing end 31 of the movable slot 3, the sheath structure is higher than the operating portion 21 of the handle 2, and referring to the circuit breaker in fig. 2, the circuit breaker is mounted on the clamping rail along the vertical direction, that is, the position of the shield structure 4 on the closing end 31 is just above the operating portion 21, so the design has the advantages that when the handle 2 moves to the closing end 31, the operating portion 21 is driven to be accommodated in the accommodating groove 41 formed by the shield structure 4, the operating portion 21 with the closing position is semi-surrounded by the shield structure 4, the circuit breaker is prevented from being opened and cut off due to the falling of foreign matter in the vertical direction or the accidental touch of the handle 2 at the closing position by external force, and thus the design not only plays a role of shielding and protecting the handle 2 at the closing position, but also plays a role of preventing misoperation, the installation and use stability is good, and the normal and safe use of the circuit breaker is ensured.

The specific arrangement of the shield structure 4 is described in detail below with reference to fig. 1-4:

the shield structure 4 is formed at the top of the housing 1 near the upper left end of the incoming line side terminal, the side profile of the shield structure 4 is trapezoidal, the shield structure 4 comprises two side baffles 43 arranged at two sides of the accommodating groove 41, and a shielding boss 42 connected between the two side baffles 43, the shielding boss 42 is connected with the two side baffles 43 to form the accommodating groove 41, when the handle 2 is at the closing position, the shield structure can drive the operating part 21 to be accommodated in the accommodating groove 41 formed by connecting the two side baffles 43 and the shielding boss 42, and according to the fact that the shielding boss 42 is higher than the operating part 21 accommodated in the accommodating groove 41, in the vertical installation direction, the shielding boss 42 plays a shielding and protecting role on the operating part 21, and prevents the handle 2 from being touched by foreign matters falling in the vertical direction of the circuit breaker to cause misoperation, and play the effect of sheltering from to the position of operating portion 21 both sides through two side shields 43 to prevent that side external force from touching operating portion 21 and arousing handle 2 malfunction, realize partly enclosing the handle 2 that is in the closing position through above-mentioned guard shield structure 4 setting, and shelter from the operating portion 21 of handle 2 in the vertical direction, the protective effect is good, guarantees circuit breaker safe handling.

As shown in fig. 4, the receiving recess 41 has an opening connected to the closing end 31 of the movable slot 3, and the opening extends to the top of the two side guards 43, so that the operating portion 21 reaches the closing end 31 and enters the receiving recess 41 from the opening, and of course, an operator can also dial the operating portion 21 of the handle 2 from the opening, and the shield structure 4 with a semi-surrounding design does not affect the manual opening and closing operation of the handle 2.

In a preferred embodiment, the movable slot 3 is an arc slot structure, a locking hole 30 for passing a locking member 71 is disposed in the middle of the movable slot 3, and the locking member 71 is passed through the locking hole 30 to limit the handle 2 from reciprocating between the closing end 31 and the opening end 32, so that the handle 2 in the closing position or the opening position can be locked.

With reference to fig. 4-5, the miniature circuit breaker structure provided in this embodiment further includes a movable contact 11 and a stationary contact 12 disposed in the housing 1, and two arc-extinguishing chambers 5 disposed below the movable contact 12 and the stationary contact 12, and arc-striking channel structures 6 having Y-shaped structures are extended between the movable contact 11 and the stationary contact 12 and the two arc-extinguishing chambers 5, specifically, one of the arc-extinguishing chambers 5 is disposed below the stationary contact 12, the other arc-extinguishing chamber 5 is disposed below the movable contact 11, and the volume of the arc-extinguishing chamber 5 disposed below the stationary contact 12 is smaller than the volume of the arc-extinguishing chamber 5 disposed below the movable contact 11, by adopting the design of the present solution, the arc-striking channel structure 6 designed by the Y-shaped structure is beneficial to performing fast arc striking between the two arc-extinguishing chambers 5, so as to increase an arc striking range, when the movable contact 12 and the stationary contact 12 are broken to generate an arc, the arc is respectively introduced into the two arc-extinguishing chambers 5 through the arc-striking channel structures 6 to perform fast arc extinguishing, through set up two explosion chambers 5 in casing 1, increased the arc extinguishing scope, the arc extinguishing ability is showing and is improving to can improve the breaking capacity of circuit breaker, and utilize two explosion chambers 5 to carry out the advantage of arc extinguishing work simultaneously, arc extinguishing efficiency obtains promoting by a wide margin, is favorable to the circuit breaker to miniaturize and high breaking tendency development, thereby promotes the performance of circuit breaker product.

In a preferred embodiment, said arc ignition channel structure 6 comprises a first channel extending to connect one of said arc extinguishing chambers 5, and a second channel extending to connect another one of said arc extinguishing chambers 5, and a third channel extending from the intersection of the first channel and the second channel to the contact of the moving contact 12 and the static contact 12, the fork openings of the first channel and the second channel are provided with arc-shaped arc striking protrusions, the arc striking bulge is beneficial to reducing the resistance of electric arc entering the two arc extinguish chambers 5, the electric arc generated between the moving contact 12 and the static contact 12 moves towards the two arc extinguish chambers 5 along the third channel, when the electric arc enters the position of the clamping fork opening between the first channel and the second channel, the electric arc can be divided into two paths of electric arcs to be absorbed by the two arc extinguishing chambers 5, the arc suction capacity and the arc extinguishing capacity of the two arc extinguishing chambers 5 are improved, the arc striking efficiency is high, the breaking tripping capacity of the circuit breaker is improved, and the service life of the circuit breaker is prolonged.

In this embodiment, as shown in fig. 4 to 5, an operating structure 7 connected to the handle 2 and a hydraulic electromagnetic trip mechanism 8 connected to the operating structure 7 are disposed in the housing 1, the operating structure 7 drives the moving contact 11 to contact or separate from the stationary contact 12 when the handle 2 performs switching on or switching off, and the hydraulic electromagnetic trip mechanism 8 drives the operating structure 7 to perform a switching off trip action when triggered, so that the moving contact 11 is separated from the stationary contact 12 by the driving of the operating structure 7. According to the structure, due to the adoption of the hydraulic electromagnetic tripping mechanism, the overload tripping and the short-circuit tripping of the circuit breaker can be integrated, the hydraulic electromagnetic tripping mechanism 8 can be closed immediately after tripping, the optional range of the tripping time requirement is wide, and the hydraulic electromagnetic tripping mechanism can be assembled with the double arc-extinguishing chamber 5 structure for use, so that the installation requirement of the internal space of a circuit breaker product is met, the overload and short-circuit protection effect is provided for the circuit breaker with the double arc-extinguishing chamber 5 structure, and the use performance of the product is improved.

As a specific structure, the operating structure 7 includes a contact support 73 rotatably disposed on the housing 1, and a locking member and a releasing member 72 pivotally disposed on the contact support 73, the movable contact 11 is disposed on the contact support 73, the locking member and the releasing member 72 have a locking state in which they are connected to each other by fastening and a releasing state in which they are separated by releasing, the hydraulic electromagnetic tripping mechanism 8 has a driving assembly for driving the releasing member 72 and the locking member to move from the locking state to the releasing state when being triggered, the driving assembly includes a driving plate 82 and a rotating arm 81, and the releasing member 72 is correspondingly provided with a releasing boss 74 engaged with one end of the rotating arm 81. With the structure, when the driving plate 82 is driven by the hydraulic electromagnetic tripping mechanism 8 to drive the rotating arm 81 to rotate in the direction close to the tripping element 72, one end of the rotating arm is pushed against the tripping boss 74 of the tripping element, so that a tripping force separated from the rotation of the locking element is applied to the tripping element 72, the tripping element 72 and the locking element move from a locking state to a tripping state, and the contact support 73 drives the movable contact 11 to be separated from the fixed contact 12 under the action of the reset spring, so that the tripping and opening operations of the circuit breaker are realized, and the safe use of the circuit breaker is guaranteed.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. The utility model provides a miniature circuit breaker structure, includes casing (1), rotates and sets up in handle (2) at casing (1) top, casing (1) top is provided with and supplies movable groove (3) that divide-shut brake motion are made in handle (2), handle (2) have and wear to stretch out operation portion (21) in movable groove (3), its characterized in that: the two ends of the movable groove (3) are respectively a switching-on end (31) and a switching-off end (32), the handle (2) drives the operating part (21) to abut against the switching-off end (32) or the switching-off end (32) when being switched on or switched off in place, a shield structure (4) higher than the operating part (21) is arranged at the top of the shell (1) around the switching-on end (31), and the operating part (21) is semi-surrounded by the shield structure (4) when moving to the switching-on end (31) along with the handle (2) and is accommodated in an accommodating groove (41) formed by the shield structure (4).

2. The miniature circuit breaker structure of claim 1, wherein: the shield structure (4) comprises two side baffles (43) arranged on two sides of the accommodating groove (41) and a shielding boss (42) connected between the two side baffles (43), the shielding boss (42) is connected with the two side baffles (43) to form the accommodating groove (41), and the shielding boss (42) is higher than the operating part (21) accommodated in the accommodating groove (41).

3. The miniature circuit breaker structure of claim 2, wherein: the accommodating groove (41) is provided with an opening part connected with a closing end (31) of the movable groove (3), and the opening part extends to the tops of the two side baffles (43).

4. A miniature circuit breaker structure according to claim 3, wherein: the shield structure (4) is formed at the upper left end of the top of the shell (1) close to the wire inlet side terminal, and the side profile of the shield structure is trapezoidal.

5. The miniature circuit breaker structure of claim 4, wherein: the movable groove (3) is of an arc-shaped groove structure, a locking hole (30) used for penetrating a locking piece (71) is formed in the middle of the movable groove (3), and the locking piece (71) penetrates the locking hole (30) to limit the handle (2) to reciprocate between the closing end (31) and the opening end (32).

6. The miniature circuit breaker structure of any of claims 1-5, wherein: the arc striking device is characterized by further comprising a moving contact (11) and a fixed contact (12) which are arranged in the shell (1) and two arc extinguishing chambers (5) which are arranged below the moving contact and the fixed contact (12) relatively, wherein an arc striking channel structure (6) which is of a Y-shaped structure extends between the moving contact (11) and the fixed contact (12) and the two arc extinguishing chambers (5).

7. The miniature circuit breaker structure of claim 6, wherein: one of the arc extinguish chambers (5) is arranged below the static contact (12), the other arc extinguish chamber (5) is arranged below the moving contact (11), and the volume of the arc extinguish chamber (5) arranged below the static contact (12) is smaller than that of the arc extinguish chamber (5) arranged below the moving contact (11).

8. The miniature circuit breaker structure of claim 7, wherein: the arc striking channel structure (6) comprises a first channel which is connected with one of the arc extinguishing chambers (5) in an extending mode, a second channel which is connected with the other arc extinguishing chamber (5) in an extending mode, and a third channel which is intersected by the first channel and the second channel and extends to the contact position of the movable contact and the fixed contact (12).

9. The miniature circuit breaker structure of claim 7 or 8, wherein: the automatic switching device is characterized in that an operating structure (7) connected with the handle (2) and a hydraulic electromagnetic tripping mechanism (8) connected with the operating structure (7) are arranged in the shell (1), the operating structure (7) drives the moving contact (11) to be in contact with or separated from the static contact (12) when the handle (2) performs switching-on or switching-off, and the hydraulic electromagnetic tripping mechanism (8) drives the operating structure (7) to perform switching-off tripping action when triggered, so that the moving contact (11) is separated from the static contact (12) under the driving of the operating structure (7).

10. The miniature circuit breaker structure of claim 9, wherein: the operating structure (7) comprises a contact support (73) rotatably arranged on the shell (1), and a locking piece and a tripping piece (72) which are pivotally arranged on the contact support (73), wherein the moving contact (11) is arranged on the contact support (73), the locking piece and the tripping piece (72) have a locking state of connected locking and a tripping state of separated tripping, the hydraulic electromagnetic tripping mechanism (8) is provided with a driving assembly which drives the tripping piece (72) and the locking piece to move from the locking state to the tripping state when being triggered, the driving assembly is composed of a driving plate (82) and a rotating arm (81), and the tripping piece (72) is correspondingly provided with a tripping boss (74) matched with one end of the rotating arm (81).